Etude in vitro et in vivo l’efficacité de l’extrait phénolique de Salvia officinalis sur Botrytis cinerea et Rhizoctonia solani.

Abstract

The tomato, Lycopersicon esculentum Mill. Is frequently subject to permanent risks of pathogenic fungal attack. Rhizoctonia Solani and Botrytis cinerea can cause enormous damage, on tomato, from sowing until its commercialization. This study aims to test the biological fungicidal activity of the phenolic extract of the leaves of Salvia officinalis on two isolates of soil and aerial phytopathogenic fungi (Rhizoctonia solani and botrytis cinerea). Ascending concentrations were prepared from the acetone extract produced by the Soxhlet method (20-40-60-80 and 100% vs a control). The results show that inhibition of mycelial growth and sporulation of the two isolates is proportionally dependent on the concentration of the applied extract; The increase in concentration leads to an increase in the inhibitory effect and consequently a decrease in the growth rate. A 100% inhibition rate was noted at high doses (100%), against both pathogens. In vivo, the treatments showed a very high efficacy, of which all the treated plants resisted compared to the untreated controls and this for the two diseases.